KR20210119612A - Wearable display device - Google Patents

Abstract

A wearable display device of the present invention includes: a substrate; a first sensing unit disposed on the substrate; and a display unit disposed on the first sensing unit, and including a light emitting device emitting first light to a front surface to display an image and emitting second light to a rear surface facing the substrate. The first sensing unit measures a biosignal generated from a user's body by using second light reflected from the user's body.

Description

Wearable display device {WEARABLE DISPLAY DEVICE}

The present invention relates to a wearable display device.

Recently, wearable devices have been manufactured in various forms. In particular, as a clothing-type wearable device, there is a growing interest in a wearable device that a user wears to measure a user's bio-signals and check a health condition through the wearable device.

SUMMARY OF THE INVENTION One object of the present invention is to provide a wearable display device capable of measuring a user's biosignal using light emitted from a light emitting device included in a display unit and monitoring a health state according to the measured biosignal in real time through a display unit. is to provide

A wearable display device according to embodiments of the present invention includes a substrate, a first sensing unit disposed on the substrate, and a first sensing unit disposed on the first sensing unit, emitting a first light to a front surface, and displaying an image; and a display unit including a light emitting device emitting a second light toward a rear surface of the substrate. The first sensing unit may measure a biosignal generated from the user's body by using the second light reflected from the user's body.

In an embodiment, the wearable display device may further include a controller disposed on the substrate and configured to control the first sensing unit and the display unit. The first sensing unit may include a light receiving element that receives the second light reflected from the user's body and converts it into an electrical signal. The control unit may include a measuring circuit electrically connected to the light receiving element and measuring the biosignal based on the electric signal.

In an embodiment, the light-receiving element may be disposed to be non-overlapping with the light-emitting element on a plane.

In an embodiment, the first sensing unit may further include a light blocking pattern including at least one opening exposing the substrate.

In an embodiment, the at least one opening may overlap the light emitting device on a plane.

In an embodiment, the light blocking pattern may cover an upper surface of the light receiving element.

In an embodiment, the light emitting device may emit red light or green light as the second light.

In an embodiment, the first sensing unit may further include a first sensing electrode and a second sensing electrode electrically connected to the measurement circuit and spaced apart from each other. The measuring circuit may measure the biosignal based on an amount of change in capacitance between the first sensing electrode and the second sensing electrode.

In an embodiment, the first sensing electrode and the second sensing electrode may be disposed to overlap the light emitting device on a plane.

In an embodiment, the first sensing unit, a first part is disposed on the substrate, a second part is disposed on a base layer bent under the substrate, and the second part of the base layer, the measurement It may include a first sensing electrode and a second sensing electrode electrically connected to the circuit.

In an embodiment, the first sensing electrode and the second sensing electrode may be exposed from the base layer. The measuring circuit applies a current to the user's body through a first sensing electrode, detects a voltage of the user's body contact portion through the second sensing electrode, and based on the detected voltage, the user's Biosignals can be measured.

In an embodiment, the measurement circuit may generate sensing data based on the measured bio-signal. The controller may further include a processor that controls the display unit to display an image including the user's biometric information based on the sensed data.

In an embodiment, the controller provides a display driving circuit for driving the display unit under the control of the processor, and power required for the measurement circuit to measure the biosignal, to the measurement circuit, and The display unit may further include a battery unit that provides power required for driving the display unit to the display driving circuit. The battery unit may be charged by a solar energy charging method or a vibration energy charging method.

In an embodiment, the wearable display device may further include a clothing unit formed of a material that closely adheres to the user's body, and the substrate may be attached to at least a portion of the clothing unit.

In an embodiment, the wearable display device may further include a second sensing unit attached to a position where the substrate is not attached to the clothing unit, and a connection member electrically connecting the measurement circuit and the second sensing unit. have. The measurement circuit may measure the biosignal using the second sensing unit.

In one embodiment, the connecting member may be formed of a conductive fiber material.

In an embodiment, the wearable display device may further include a second sensing unit attached to a position where the substrate is not attached to the clothing unit, and a communication unit for transmitting a signal between the measurement circuit and the second sensing unit. . The measurement circuit may measure the biosignal using the communication unit and the second sensing unit.

A wearable display device according to embodiments of the present disclosure may include a sensing unit capable of measuring a biosignal using light emitted from the display unit. Accordingly, since the sensing unit does not include a separate light source for measuring biosignals, the wearable display device may be simplified.

In addition, according to the wearable display device according to the embodiments of the present invention, the user can monitor the health state according to the measured bio-signal through the display unit in real time.

However, the effects of the present invention are not limited to the above-described effects, and may be variously expanded without departing from the spirit and scope of the present invention.

1 is a diagram illustrating a wearable display device according to embodiments of the present invention.
FIG. 2 is a diagram illustrating an example of a biosignal sensor included in the wearable display device of FIG. 1 .
FIG. 3 is a diagram illustrating an example of a user biosignal sensing operation of the biosignal sensor of FIG. 2 .
4A and 4B are diagrams illustrating another example of a biosignal sensor included in the wearable display device of FIG. 1 .
5 is a diagram illustrating an example of a user biosignal sensing operation of the biosignal sensor of FIGS. 4A and 4B .

Since the present invention can have various changes and can have various forms, specific embodiments are illustrated in the drawings and described in detail in the text. However, this is not intended to limit the present invention to the specific disclosed form, it should be understood to include all modifications, equivalents and substitutes included in the spirit and scope of the present invention.

In describing each figure, like reference numerals have been used for like elements. In the accompanying drawings, the dimensions of the structures are enlarged than the actual size for clarity of the present invention. Terms such as first, second, etc. may be used to describe various elements, but the elements should not be limited by the terms. The above terms are used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, a first component may be referred to as a second component, and similarly, a second component may also be referred to as a first component. The singular expression includes the plural expression unless the context clearly dictates otherwise.

In the present application, terms such as “comprise” or “have” are intended to designate that a feature, number, step, operation, component, part, or combination thereof described in the specification exists, but one or more other features It is to be understood that it does not preclude the possibility of the presence or addition of numbers, steps, operations, components, parts, or combinations thereof.

In addition, when a part is said to be "connected" with another part, it includes not only a case in which it is directly connected, but also a case in which another element is interposed therebetween.

Also, when a part of a layer, film, region, plate, etc. is said to be "on" another part, this includes not only the case where it is "directly on" another part, but also the case where another part is in the middle. In addition, in the present specification, when a portion such as a layer, film, region, or plate is formed on another portion, the formed direction is not limited only to the upper direction, and includes those formed in the side or lower direction. . Conversely, when a part of a layer, film, region, plate, etc. is said to be “under” another part, this includes not only cases where it is “directly under” another part, but also a case where another part is in between.

Hereinafter, embodiments of the present invention will be described in more detail with reference to the accompanying drawings.

1 is a diagram illustrating a wearable display device according to embodiments of the present invention.

Referring to FIG. 1 , the wearable display device 1000 may include a clothing unit 100 and a biosignal sensor 200 .

The clothing unit 100 may be formed of a material and a structure that is in close contact with the user's body. To this end, the clothing unit 100 may be made of a material having excellent elasticity. For example, the clothing part 100 may be made of a spandex material, various fiber materials mixed with spandex, or the like. As the clothing unit 100 closely adheres to the user's body, the biosignal measurement accuracy of the biosignal sensor 200 may be improved.

Meanwhile, although the clothing unit 100 is illustrated as a T-shirt (or a top) in FIG. 1 , this is exemplary and the clothing unit 100 is not limited thereto. For example, the clothing unit 100 may be composed of various wearable products such as bottoms, shoes, socks, and armbands.

The biosignal sensor 200 may be attached to at least a part of the clothing unit 100 . In FIG. 1 , the biosignal sensor 200 is illustrated as being attached to the arm portion of the clothing unit 100 , but this is exemplary and is not limited thereto, and may be attached to other portions of the clothing unit 100 . Also, a plurality of biosignal sensors 200 may be attached to the clothing unit 100 .

The biosignal sensor 200 may measure a biosignal generated from the user's body, and may display an image including the user's biometric information based on the measured biosignal. Here, the biosignal sensor 200 may measure an electrocardiogram (ECG), respiration, activity, body temperature, and the like as biosignals.

The biosignal sensor 200 includes a sensing unit ( 210 in FIG. 3 ) (or a first sensing unit) for measuring a biosignal and a display unit ( 220 in FIG. 3 ) for displaying an image including the user's biometric information. ) may be included. Here, the display unit (220 of FIG. 3 ) may include a light emitting device (LD of FIG. 3 ).

In an embodiment, the biosignal sensor 200 may measure the biosignal using light emitted from the light emitting device (LD of FIG. 3 ). For example, the light emitting element (LD in FIG. 3) is composed of a double-sided light emitting element, and the biosignal sensor 200 is emitted to the rear surface (ie, the surface facing the user's body) of the display unit (220 in FIG. 3). A biosignal generated from the user's body may be measured using light reflected from the user's body. In addition, the biosignal sensor 200 may display an image including the user's biometric information on the front surface (ie, the surface recognized by the user) of the display unit 200 of FIG. 3 . Accordingly, the user can monitor the health state according to the measured bio-signal in real time.

Meanwhile, the image displayed by the biosignal sensor 200 is not limited thereto. For example, the biosignal sensor 200 displays a logo, a specific pattern, etc. on the front surface of the display unit (200 in FIG. 3 ) to design the clothing unit 100 (or the wearable display device 1000 ). can also be changed. The biosignal sensor 200 will be described later with reference to FIGS. 2 and 3 .

In an embodiment, the wearable display device 1000 may further include connection members 310 , 320a , 320b , and 320c and sensing units 410a , 410b , and 410c (or a second sensing unit). Here, the sensing units 410a, 410b, and 410c may be formed at different positions from a position to which the biosignal sensor 200 is not attached, and the connection members 310, 320a, 320b, and 320c are connected to the biosignal sensor ( 200 ) (or the measurement circuit 232 of FIG. 2 ) and the sensing units 410a , 410b , and 410c may be electrically connected. Accordingly, the accuracy of the user's bio-signal measurement may be improved.

Meanwhile, the connecting members 310 , 320a , 320b , and 320c may be made of a conductive fiber material for the wearing comfort of the clothing part 100 . For example, the connection members 310 , 320a , 320b , and 320c may be configured such that a signal transmission line and a grounding line made of conductive fibers formed inside the fabric are spaced apart from each other.

In FIG. 1, the sensing units 410a, 410b, and 410c are illustrated as three, but the number of the sensing units 410a, 410b, 410c is not limited thereto. For example, the sensing units may be composed of four or more. have. Accordingly, the accuracy of the user's bio-signal measurement may be improved.

In an embodiment, the wearable display device 1000 may not include the connecting members 310 , 320a , 320b , and 320c . In this case, the wearable display device 1000 includes the biosignal sensor 200 and the sensing units 410a and 410b so that the biosignal sensor 200 can measure the user's biosignal from the sensing units 410a, 410b, and 410c. 410c) may further include a communication unit in the form of a chip for signal transmission.

In an embodiment, the biosignal sensor 200 , the connection members 310 , 320a , 320b , and 320c , and the sensing units 410a , 410b , and 410c may be configured to be detachably attached to the clothing unit 100 . Accordingly, when the user wears the wearable display device 1000, the biosignal sensor 200, the connecting members 310, 320a, 320b, and 320c, and the sensing units 410a, 410b, and 410c are connected to the clothing unit ( 100) to measure a biosignal, and when the wearable display device 1000 is not worn, the biosignal sensor 200, the connecting members 310, 320a, 320b, and 320c, and the sensing units 410a, 410b, 410c) can be detached from the clothing unit 100 to easily wash the clothing unit 100 .

FIG. 2 is a diagram illustrating an example of a biosignal sensor included in the wearable display device of FIG. 1 , and FIG. 3 is a diagram illustrating an example of a user biosignal sensing operation of the biosignal sensor of FIG. 2 .

Referring to FIG. 2 , the biosignal sensor 200 may include a display area DA in which an image is displayed. Pixels PX for displaying an image may be positioned in the display area DA. Here, the pixel PX may emit red, green, or blue light. Each pixel PX may include a light emitting device LD, and for example, each pixel PX may include an organic light emitting diode.

The biosignal sensor 200 may include a substrate SUB, a sensing unit 210 (or a first sensing unit), a display unit 220 , and a control unit 230 .

The substrate SUB may be in contact with (or in close contact with) the skin SK of a portion of the user's body to which the biosignal sensor 200 is attached. Here, the substrate SUB may be a flexible substrate capable of bending, folding, rolling, etc. to facilitate contact (or close contact) with the user's skin SK. For example, the substrate SUB may be made of a polymer such as polyimide (PI), polyacrylate (PA), or polyethylene terephthalate (PET).

Although not shown in FIGS. 2 and 3 , for signal transmission between the sensing unit 210 and the control unit 230 and signal transmission between the display unit 220 and the control unit 230 , the substrate SUB is a flexible printed circuit board. (flexible printed circuit board, FPCB) may be included.

Meanwhile, as described with reference to FIG. 1 , the biosignal sensor 200 may be detachably attached to the clothing unit 100 . To this end, the biosignal sensor 200 may further include an adhesive member AM disposed on one surface (eg, a surface in contact with the user's skin SK) of the substrate SUB.

The controller 230 may control the sensing unit 210 and the display unit 220 , and may include a display driving circuit 231 , a measurement circuit 232 , a processor 233 , and a battery unit 234 . have. The display driving circuit 231 , the measurement circuit 232 , the processor 233 , and the battery unit 234 included in the controller 230 may be disposed on the substrate SUB so as not to overlap the display area DA. .

The processor 233 may control the overall operation of the biosignal sensor 200 . For example, the processor 233 may be implemented as a system-on-chip.

The processor 233 may control the display driving circuit 231 . The processor 233 may generate input image data and a control signal and provide it to the display driving circuit 231 .

The processor 233 may control the measurement circuit 232 . The processor 233 may provide a control signal for measuring a user's bio-signal to the measurement circuit 232 .

In addition, the processor 233 may include a memory, a communication device, and the like.

The display driving circuit 231 may drive the display 220 under the control of the processor 233 . The display driving circuit 231 may generate a data signal and a scan signal based on input image data and a control signal provided from the processor 233 , and may supply a data signal to each of the pixels PX through data lines, and scan the data signal. A scan signal may be supplied to each of the pixels PX through the lines.

In one embodiment, the display driving circuit 231 is configured as an integrated circuit (IC) to be attached on the substrate SUB by a chip on glass (COG) method, a chip on plastic (COP) method, an ultrasonic bonding method, or the like. can

The measurement circuit 232 may measure the user's biosignal under the control of the processor 233 . The measuring circuit 232 may be electrically connected to the light receiving element 211 or the sensing electrodes 212 included in the sensing unit 210 to measure a user's biosignal. The measurement circuit 232 may generate sensing data based on the measured user's bio-signal and provide it to the processor 233 .

In an embodiment, the processor 233 may control the display 220 to display an image including the user's biometric information based on the sensed data provided from the measurement circuit 232 . To this end, the processor 233 may generate input image data corresponding to the user's biometric information image and provide it to the display driving circuit 231 .

The battery unit 234 provides the measurement circuit 232 with power required for measuring the biosignal of the measurement circuit 232 , and supplies the power required for driving the display unit 220 of the display driving circuit 231 to the display driving circuit 231 . ) can be provided.

In an embodiment, the battery unit 234 may be charged by a solar energy charging method or a vibration energy charging method. To this end, the biosignal sensor 200 may include a charging module 240 formed on the controller 230 . For example, the charging module 240 may be configured as a solar charging module or a vibration charging module.

Meanwhile, a power line PL for supplying power required to drive the pixels PX may be formed outside the display area DA, and the battery unit 234 connects to the pixel PX through the power line PL. ) can supply the power needed to drive them. The power line PL includes two lines formed outside the display area DA in the second direction DR2 and one line formed outside the display area DA in the first direction DR1 . It can be formed by combining.

The sensing unit 210 is disposed on the substrate SUB and may include a light receiving element 211 , sensing electrodes 212 , and a light blocking pattern 213 .

In an embodiment, the light receiving element 211 may be disposed to not overlap the pixels PX (or the light emitting element LD included in the pixels PX). Accordingly, a path through which the light emitted by the pixels PX moves to the surface of the user's skin SK may be formed.

Meanwhile, although one light receiving element 211 is illustrated in FIGS. 2 and 3 , this is exemplary and the light receiving element 211 may include two or more. Accordingly, the accuracy of the biosignal measurement of the biosignal sensor 200 may be improved.

In an embodiment, the first sensing electrode 212a and the second sensing electrode 212b are the pixels PXs (or the light emitting devices LD included in the pixels PXs) along the first direction DR1 . ) and can be arranged non-overlapping. Accordingly, a path through which the light (or the second light L2a) emitted by the pixels PX moves to the surface of the user's skin SK may be formed.

The first sensing electrode 212a and the second sensing electrode 212b may be spaced apart from the user's skin SK by the substrate SUB (or non-contact). The first sensing electrode 212a and the second sensing electrode 212b disposed to be spaced apart from each other may form a capacitance, and the capacitance formed between the first sensing electrode 212a and the second sensing electrode 212b is It may change under the influence of the user's biosignals. Here, the sensing electrodes 212 may be composed of at least two or more to form an electrostatic capacity.

In an embodiment, the biosignal sensor 200 (or the measuring circuit 232 ) measures the biosignal based on the amount of change in capacitance between the first sensing electrode 212a and the second sensing electrode 212b. can

For example, when the biosignal sensor 200 comes into contact with the user's body (or skin SK), the capacitance value between the first sensing electrode 212a and the second sensing electrode 212b at the contact portion. It can be slightly changed under the influence of this user's bio-signals. The measurement circuit 232 measures the amount of change in the capacitance value, amplifies the amount of change in the measured capacitance value through an amplifier (AMP), and filters information not related to the biosignal to measure the biosignal. have. As described above, the measurement circuit 232 may generate sensed data based on the measured biosignal and provide the sensed data to the processor 233 . The processor 233 may control the display 220 to display an image including the user's biometric information based on the sensed data provided from the measurement circuit 232 .

Meanwhile, although two sensing electrodes 212 are illustrated in FIGS. 2 and 3 , this is exemplary and the sensing electrodes 212 may be composed of three or more. Accordingly, the accuracy of the biosignal measurement of the biosignal sensor 200 may be improved.

The light blocking pattern 213 may be disposed on the substrate SUB and may serve as a black matrix (BM) blocking light emitted from the light emitting device LD. The light blocking pattern 213 may include a black organic polymer material including a black dye or pigment capable of blocking light, or a metal (metal oxide) such as chromium or chromium oxide.

In an embodiment, the light blocking pattern 213 may include at least one opening exposing the substrate. Since the light blocking pattern 213 includes an opening, a path through which the light (or the second light L2a) emitted from the pixels PX moves to the surface of the user's skin SK through the opening and the user's skin ( A path through which the light reflected from the SK (or the second light L2b) moves to the light receiving element 211 may be formed.

In an embodiment, the light blocking pattern 213 may cover an upper surface (eg, a surface facing the display unit 220 ) of the light receiving element 211 . Accordingly, a path through which the light (or the second light L2a) emitted from the pixels PX moves directly to the light receiving element 211 without passing through the surface of the user's skin SK may be blocked.

The display unit 220 is disposed on the sensing unit 210 , and may include a pixel circuit layer 221 , a first electrode layer 222 , a light emitting device layer 223 , and a second electrode layer 224 .

The pixel circuit layer 221 may be disposed on the sensing unit 210 . In the pixel circuit layer 221 , not only transistors of each of the pixels PXs, but also scan lines and data lines may be disposed. Each transistor may include a gate electrode, a semiconductor layer, a source electrode, and a drain electrode.

A first electrode layer 222 , a light emitting device layer 223 , and a second electrode layer 224 may be sequentially stacked on the pixel circuit layer 221 in the third direction DR3 . The light emitting device layer 223 may include pixels PX that emit light and a pixel defining layer defining the pixels PX. The pixels PX of the light emitting device layer 223 may be disposed in the display area DA.

The light emitting device layer 223 may be an organic light emitting layer including an organic material. In this case, the light emitting device layer 223 may include a hole transporting layer, an organic light emitting layer, and an electron transporting layer.

The light emitting device layer 223 may include an inorganic light emitting device. In this case, the first electrode layer 222 and the second electrode layer 224 are disposed on the same layer, and the inorganic light emitting device is electrically connected to the first electrode of the first electrode layer 222 and the second electrode of the second electrode layer 224 . can be connected to

In an embodiment, the light emitting device layer 223 may include a light emitting device LD that emits light from both sides. The light emitting element LD emits the first light L1 to the front surface (eg, the surface visible to the user), and is directed toward the rear surface (eg, the sensing unit 213 or the user's skin SK). surface) to emit the second light L2a.

The display 220 may display an image from the front using the first light L1 emitted from the light emitting device LD. For example, the display 220 may display an image including the user's biometric information by using the first light L1 . Accordingly, the user can monitor the health state according to the measured bio-signal through the display unit in real time.

In one embodiment, the biosignal sensor 200 (or the sensing unit 210 ) moves from the light emitting device LD to the rear surface (eg, the sensing unit 213 or the surface facing the user's skin SK). The biosignal generated in the user's body may be measured using the second light L2b emitted and reflected from the user's body (eg, the user's blood vessel BV).

In one embodiment, the light receiving element 211 is emitted from the light emitting element LD to the rear side, receives the second light L2b reflected from the user's body (eg, the user's blood vessel BV) to receive electricity It can be converted into a signal (eg, current, etc.).

The light receiving element 211 may measure the amount of change in reflected light intensity according to the blood flow of the user's blood vessel BV. For example, at the systolic peak when blood flow is increased due to the contraction of the heart, the blood pressure rises, but the light (or the second light L2a) is absorbed a lot by the blood, so that the intensity of the reflected light is weak, and the intensity of the reflected light is strong during the diastole. . The light receiving element 211 may measure the intensity variation of the reflected light and convert it into an electrical signal. The light receiving element 211 may be formed of, for example, a photodiode (PD). The light receiving element 211 may provide the converted electrical signal to the measurement circuit 232 .

In one embodiment, in order to measure the user's bio-signal, the bio-signal sensor 200 serves as the second light L2a, a pulse wave in consideration of light absorption, or a neutral light source for signal quantity correction, green light in a wavelength band of 530 nm or Red light in a wavelength band of 660 nm that can be used to obtain a pulse wave for measuring blood pressure may be used. That is, in order to measure the user's biosignal, the light emitting device LD may emit red light or green light as the second light L2a.

The measurement circuit 232 may measure the biosignal based on the electrical signal provided from the light receiving element 211 . For example, the measurement circuit 232 may include a trans-impedance amplifier (TIA), a programmable gain amplifier (PGA), and an analog-to-digital converter (ADC) for signal processing. ) may be included. Here, the transimpedance amplifier converts an electrical signal (eg, current) into an output voltage, the programmable gain amplifier amplifies the gain value of the output voltage, and the analog-to-digital converter converts the analog output voltage value into a digital format value. can be converted into a biosignal.

As described above, the measurement circuit 232 may generate sensed data based on the measured biosignal and provide the sensed data to the processor 233 . The processor 233 may control the display 220 to display an image including the user's biometric information based on the sensed data provided from the measurement circuit 232 .

The biosignal sensor 200 may further include a window layer WDL disposed on the display unit 220 . The window layer WDL may be disposed on the sensing unit 210 and the display unit 220 to protect the sensing unit 210 and the display unit 220 from external scratches. The front surface (or upper surface) of the window layer WDL may be a surface in contact with the user's input means (finger).

In an embodiment, the biosignal sensor 200 may further include a polarization layer disposed between the display unit 220 and the window layer WDL. In this case, the window layer WDL may be attached on the display unit 220 and the polarization layer by an adhesive layer. Here, an optical clear adhesive (OCA) or an optical clear resin (OCR) may be used as the adhesive layer.

Meanwhile, in order to form a light movement path of the first light L1 and the second light L2a and L2b, the substrate SUB and the window layer WDL may be formed to be transparent.

As described with reference to FIGS. 1 to 3 , the wearable display device 1000 (or the biosignal sensor 200 ) according to embodiments of the present invention is provided from the light emitting device LD of the display unit 220 . A sensing unit 210 capable of measuring a biosignal using the emitted second light L2a may be included. Accordingly, since the sensing unit 210 does not include a separate light source for measuring biosignals, the wearable display device 1000 may be simplified.

In addition, the wearable display device 1000 according to embodiments of the present invention may include a display unit 220 that displays an image including the user's biometric information. Accordingly, the user may monitor the health state according to the measured bio-signal through the display unit 220 in real time.

4A and 4B are views illustrating another example of a biosignal sensor included in the wearable display device of FIG. 1 , and FIG. 5 is a view showing an example of a user biosignal sensing operation of the biosignal sensor of FIGS. 4A and 4B am. Meanwhile, except for the configuration in which the biosignal sensor 200 ′ further includes the base layer 214 and the configuration in which the sensing electrodes 212 ′ are formed on the base layer 214 , the Since the biosignal sensor 200 ′ is substantially the same as or similar to the biosignal sensor 200 of FIGS. 2 and 3 , the overlapping description will not be repeated.

4A to 5 , the sensing unit 210 may further include a base layer 214 .

The base layer 214 may include a first sensing electrode 212a ′ and a second sensing electrode 212b ′ electrically connected to the measurement circuit 232 .

In an embodiment, the first portion of the base layer 214 (eg, one end of the base layer 214 ) may be disposed on the substrate SUB. In addition, the base layer 214 is bent to the lower surface of the substrate SUB (eg, the surface where the substrate SUB faces the user's body) to form a second portion (eg, the base layer) of the base layer 214 . The other end of 214 ) and the sensing electrodes 212 ′ may be disposed on the lower surface of the substrate. To this end, the base layer 214 may be formed of a flexible printed circuit board (FPCB).

The first sensing electrode 212a ′ and the second sensing electrode 212b ′ may be exposed from the base layer 214 while the base layer 214 is bent. Accordingly, the first sensing electrode 212a ′ and the second sensing electrode 212b ′ may be in contact with the user's body (eg, the user's skin SK).

In an embodiment, the measurement circuit 232 may measure the user's biosignal using the first sensing electrode 212a' and the second sensing electrode 212b'. For example, the measurement circuit 232 may be configured via one (or current electrode) of the sensing electrodes 212 ′ (eg, the first sensing electrode 212a ′ or the second sensing electrode 212b ′). Current can be applied to the user's body. In addition, the measurement circuit 232 may be configured to allow a user through the other one (or voltage electrode) of the sensing electrodes 212 ′ (eg, the second sensing electrode 212b ′ or the first sensing electrode 212a ′). can detect the voltage of the body contact part of The measurement circuit 232 may calculate an impedance value corresponding to the user by using the amount of current applied through the current electrode and the voltage measured through the voltage electrode. The measurement circuit 232 may generate sensing data based on the impedance value.

The above detailed description illustrates and describes the present invention. In addition, the foregoing is merely to show and describe preferred embodiments of the present invention, and as described above, the present invention can be used in various other combinations, modifications and environments, the scope of the concepts of the invention disclosed herein, and the writing Changes or modifications are possible within the scope equivalent to one disclosure and/or within the skill or knowledge in the art. Accordingly, the detailed description of the present invention is not intended to limit the present invention to the disclosed embodiments. In addition, the appended claims should be construed to include other embodiments as well.

100: clothing unit 200, 200 ': biosignal sensor
210, 210': sensing unit 211: light receiving element
212, 212': sensing electrodes 213: light blocking pattern
214: base layer 220: display unit
221: pixel circuit layer 222: first electrode layer
223: light emitting element layer 224: second electrode layer
230: control unit 231: display driving circuit
232: measurement circuit 233: processor
234: battery unit 240: charging module
310: connecting members 320a, 320b, 320c: connecting members
410a, 410b, 410c: sensing units 1000: wearable display device
AM: Adhesive member DA: Display area
LD: light emitting element PL: power line
SUB: substrate WDL: window layer

Claims (17)

Board;
a first sensing unit disposed on the substrate; and
It is disposed on the first sensing unit, and displays an image by emitting a first light to the front, and includes a display unit including a light emitting device for emitting a second light to the rear surface toward the substrate,
The first sensing unit measures a biosignal generated in the user's body by using the second light reflected from the user's body, a wearable display device. According to claim 1,
It is disposed on the substrate, further comprising a control unit for controlling the first sensing unit and the display unit,
The first sensing unit,
and a light receiving element that receives the second light reflected from the user's body and converts it into an electrical signal,
The control unit is
and a measurement circuit electrically connected to the light receiving element and configured to measure the biosignal based on the electric signal. The wearable display device of claim 2 , wherein the light receiving element is disposed to overlap the light emitting element on a plane. According to claim 2, wherein the first sensing unit,
The wearable display device of claim 1 , further comprising a light blocking pattern including at least one opening exposing the substrate. The wearable display device of claim 4 , wherein the at least one opening overlaps the light emitting element on a plane. The wearable display device of claim 4 , wherein the light blocking pattern covers an upper surface of the light receiving element. The wearable display device of claim 1 , wherein the light emitting device emits red light or green light as the second light. According to claim 2, wherein the first sensing unit,
Further comprising a first sensing electrode and a second sensing electrode electrically connected to the measurement circuit and spaced apart from each other,
and the measuring circuit measures the biosignal based on an amount of change in capacitance between the first sensing electrode and the second sensing electrode. The wearable display device of claim 8 , wherein the first sensing electrode and the second sensing electrode do not overlap the light emitting element on a plane. According to claim 2, wherein the first sensing unit,
a base layer having a first portion disposed on the substrate and having a second portion bent under the substrate; and
and a first sensing electrode and a second sensing electrode disposed on the second portion of the base layer and electrically connected to the measurement circuit. The method of claim 10, wherein the first sensing electrode and the second sensing electrode are exposed from the base layer,
The measuring circuit applies a current to the user's body through a first sensing electrode, detects a voltage at a body contact portion of the user through the second sensing electrode, and based on the detected voltage, the user's A wearable display device that measures biosignals. The method of claim 2, wherein the measurement circuit generates sensing data based on the measured bio-signals,
The control unit is
The wearable display device further comprising a processor for controlling the display unit to display an image including the user's biometric information based on the sensed data. The method of claim 12, wherein the control unit,
a display driving circuit for driving the display unit under the control of the processor; and
The measurement circuit further comprises a battery unit that provides power required for the measurement of the biosignal to the measurement circuit, and provides power required for driving the display unit of the display driving circuit to the display driving circuit,
The battery unit is charged using a solar energy charging method or a vibration energy charging method. The method according to claim 2, further comprising a clothing part formed of a material in close contact with the user's body,
The substrate is attached to at least a portion of the clothing unit. 15. The method of claim 14,
a second sensing unit attached to a position where the substrate is not attached to the clothing unit; and
Further comprising a connection member electrically connecting the measurement circuit and the second sensing unit,
and the measuring circuit measures the biosignal using the second sensing unit. The wearable display device of claim 15 , wherein the connection member is formed of a conductive fiber material. 15. The method of claim 14,
a second sensing unit attached to a position where the substrate is not attached to the clothing unit; and
Further comprising a communication unit for signal transmission between the measurement circuit and the second sensing unit,
and the measuring circuit measures the biosignal using the communication unit and the second sensing unit.

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